CN102091514B - Device and method for treating obnoxious gas and industrial VOCs - Google Patents
Device and method for treating obnoxious gas and industrial VOCs Download PDFInfo
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- CN102091514B CN102091514B CN 201010608702 CN201010608702A CN102091514B CN 102091514 B CN102091514 B CN 102091514B CN 201010608702 CN201010608702 CN 201010608702 CN 201010608702 A CN201010608702 A CN 201010608702A CN 102091514 B CN102091514 B CN 102091514B
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Abstract
The invention discloses a device and a method for treating obnoxious gas and industrial volatile organic compounds (VOCs). The device comprises a cylindrical insulation shell with an air inlet and an air outlet, an electrode connected with a high-voltage pulse power supply is arranged in the cavity of the insulation shell, and an adsorption layer which encircles the electrode and is made of active carbon fibers and a metal sheet which is grounded are sequentially attached to the inner wall of the insulation shell from inside to outside. By the invention, plasma reaction and active carbon fiber adsorption technology are combined, so that the retention time of the obnoxious gas or the industrial VOCs in the device is prolonged, and the treatment efficiency is improved; and in addition, active carbon fiber adsorption and regeneration are performed at the same time, so the service life of the active carbon fibers is greatly prolonged.
Description
Technical field
The present invention relates to environmental protection technical field, relate in particular to a kind of device and method of administering foul gas and industrial VOCs.
Background technology
Current, the growing serious daily life of disturbing the resident of toxic harmful exhaust gas discharging worsens people's living environment, and then health and ecological environment is worked the mischief.Industrial VOCs (volatile organic matter) and stench with peculiar smell especially become the focus that the resident complains.Therefore domestic many provinces and cities all carry out " clean air action ", and seeking VOCs and stench that a kind of practical economical and practical technology again controls industrial discharge has been very urgent.
Bioanalysis and charcoal absorption are the most common technology of controlling industrial VOCs and stench at present.Bioanalysis has investment and advantage such as operating cost is low, but floor space is big, and the treatment effect instability starts shortcomings such as difficulty.Active carbon has the effect of good deodorizing and absorption VOCs before the adsorbance that reaches capacity, but its maintenance management expense height, and it is big adsorb the useless charcoal regeneration in saturated back energy consumption, disposes bothering.
There is form in the 4th kind of material that plasma is known as except solid-state, liquid state and gaseous state, by the conducting fluid that electronics, ion, free radical and neutral particle are formed, and the whole electroneutral that keeps.In low temperature plasma, the O, the OH isoreactivity particle that have the excitation of a large amount of high energy electrons and high energy electron to produce are oxidized to harmless object or low poisonous substance with the pernicious gas pollutant.Compare with foul waste gas improvement technology with other VOCs, lower temperature plasma technology has that technology is simple, handling process weak point, small investment, occupation of land is little, clearance is high, operating cost low (mainly showing as the electricity charge), characteristics such as applied widely.
Yet when utilizing Low Temperature Plasma Treating VOCs and foul waste gas, yet there are some problems: 1, some constitutionally stable VOCs are removed efficient not high (as stupid, the toluene in the lacquer spraying waste gas etc.); 2, contain a large amount of ozone in the tail gas after the plasma treatment, cause secondary pollution; 3, region of discharge is little, and the dusty gas time of staying is short.
Summary of the invention
The invention provides a kind of device of administering foul gas and industrial VOCs, solved single-activity charcoal absorption regeneration difficulty, the cost height, single lower temperature plasma technology clearance is not high, has secondary pollution problem.
A kind of device of administering foul gas and industrial VOCs, the insulation crust of bringing gas port and gas outlet into that comprises tubular, be provided with the electrode that is connected with high-voltage pulse power source in the inner chamber of insulation crust, the inwall of insulation crust is attached with the adsorption layer of being made up of NACF of surrounding electric poles and the sheet metal of ground connection from inside to outside successively.
Described high-voltage pulse power source is the nanosecond pulse power supply, and its high-voltage pulse that act as by steep-front, narrow pulsewidth (nanosecond) is the plasma reactor energy supply, produces corona discharge pulse.Its characteristics are for adopting the energy supply of nanosecond pulse high voltage source, and electronics is accelerated into and is high energy electron, and the bigger ion of other quality since inertia have little time greatly to accelerate and keep static substantially, thereby avoided the DC corona speeding-up ion and the energy loss brought.
Preferably, described electrode is the sintering metal with loose structure, and it is raw material with the nichrome fiber, makes by crossing cloth felt, compacting and high temperature sintering, and effective diameter is 0.5mm.This electrode has the mesh structural porous structure of 3D, different aperture layers forms bore diameter gradient, the aperture based on mesoporous (2-50nm) and macropore (＞50nm), a large amount of connections or semi-connected hole are contained in inside, porosity can reach 80～90%, the pressure loss is little, and high temperature resistant and easy processing is good catalyst carrier.
Preferred, loading transition metallic catalyst on described electrode can strengthen hydro carbons and CO changes into CO
2Selective, reduced the deposition of carbonaceous material on the catalysis electrode surface, avoid the etching problem of catalysis electrode.Described transition-metal catalyst is at least a among Mn, Cu, Fe, Pb, V, Ni, Co and the Ti.
NACF diameter 15～20 μ m, specific area 1300～1500m
2/ g, pore volume 0.9～1.2mL/g, average pore size 1.8～2.0nm.When handling foul gas and VOCs, carbon fiber adsorption and catalytic combustion and regeneration are carried out simultaneously.Its principle is: when foul gas or VOCs access to plant, under high energy electron and the effect of plasma active particle series reaction takes place, be decomposed into innocuous substance, simultaneously the O that produces in a small amount of unreacted foul gas or VOCs, the course of reaction
3, O and OH isoreactivity particle are by carbon fiber adsorption and catalytic combustion and continue to react, and are adsorbed on foul gas or the oxidized decomposition of VOCs molecule on the NACF, NACF is regenerated.
Preferably, be provided with the barrier layer of being made up of porous ceramics between described sheet metal and the adsorption layer, more preferably, loading transition metallic catalyst on barrier layer, described transition metal are at least a among Mn, Cu, Fe, Pb, V, Ni, Co and the Ti.Organic molecule can be strengthened and CO changes into CO
2Selective, promote to be adsorbed on stench on the NACF or the degraded fully of VOCs molecule, prevent that the NACF duct from stopping up.
Described sheet metal is aluminium flake.
Described insulation crust is made by polymethyl methacrylate.
The present invention also provides a kind of method of administering foul gas and industrial VOCs, comprising: foul gas or the gas that contains VOCs are fed in the plasma producing apparatus continuously, in the described plasma producing apparatus sorbing material is housed.
Described sorbing material is NACF.
Described plasma producing apparatus volume is 300～500cm
3, input voltage is 10～60kV, and gas residence time is 0.8～2s, and the sorbing material volume is 1: 10～20 with the device volume ratio.
Prior art is compared the present invention and is had following obvious advantage: adopt the sintering metal catalysis electrode of transition-metal catalyst modification, can avoid the electrode corrosion problem, and improve the removal efficient of difficult degradation VOCs; Plasma carries out carbon fiber adsorption and catalytic combustion and regeneration in conjunction with the NACF integrated technique simultaneously, has greatly prolonged the service life of NACF; NACF is adsorbs malodorous gas or VOCs molecule in plasma, is equivalent to greatly prolong the time of staying of contaminant molecule in reactor; Industrial lacquer spraying waste gas (containing benzene, toluene etc.) to difficult degradation is removed the efficient height.
Description of drawings
Fig. 1 is the structural representation of apparatus of the present invention;
Fig. 2 is the output voltage waveforms schematic diagram of high-voltage pulse power source.
The specific embodiment
As shown in Figure 1, a kind of device of administering foul gas and industrial VCDs comprises that internal diameter cylindraceous is the insulation crust 1 of 50mm, length 200mm, and insulation crust 1 is made by polymethyl methacrylate, the two ends end face is closed, and the side face two ends are respectively equipped with air inlet 6 and air outlet 7.Insulation crust cavity axis is provided with the electrode of being made by sintering metal (Xibei Inst. of Non-Ferrous Metals) 5 in the place, and effective diameter is 0.5mm.This electrode has the mesh structural porous structure of 3D, different aperture layers forms bore diameter gradient, the aperture based on mesoporous (2-50nm) and macropore (＞50nm), a large amount of connections or semi-connected hole are contained in inside, porosity reaches 80～90%, load has transition-metal catalyst on the electrode 5, can select among Mn, Cu, Fe, Pb, V, Ni, Co and the Ti one or more for use.
Insulation crust 1 outside is provided with the high-voltage pulse power source 8 that is connected with electrode 5, it is BPFN type narrow-pulse high-voltage power source, about its pulse width 500ns, the pulse rising front is less than 250ns, repetition rate 200Hz, total capacitance (inductance) is 20nF (2.4 μ H), and its output voltage characteristic as shown in Figure 2.
Insulation crust 1 inwall adheres to three-decker, and that is close to insulation crust 1 inwall is the sheet metal 2 of ground connection, and present embodiment is selected aluminium flake for use.The intermediate layer is the barrier layer of being made up of micropore ceramics 3, and internal diameter is 38mm, and same load has transition-metal catalyst on the barrier layer 3.The adsorption layer 4 of the one deck at close center for being constituted by NACF, the about 4mm of absorption bed thickness, pore volume 0.9mL/g, average pore size 1.8nm.NACF diameter 15 μ m, specific area 1300m
2/ g.
When foul gas or industrial VOCs from air inlet 6 accesss to plant, series reaction takes place under high energy electron and the effect of plasma active particle, make it be decomposed into innocuous substance, simultaneously the O that produces in a small amount of unreacted stench or VOCs, the course of reaction
3, O and OH isoreactivity particle are by carbon fiber adsorption and catalytic combustion and continue to react, the oxidized decomposition of stench or VOCs, the NACF that has adsorbed polluter obtains regeneration.Gas after the processing is 7 discharges from the gas outlet.
Handle example
Adopt two same size plasma reactors identical, structural similarity that dusty gas is handled, one of them is said apparatus, and another one is the single plasma reaction device that said apparatus is removed adsorption layer.The used dusty gas of present embodiment wherein contains representative pollutant methyl sulfide CH
3SCH
3, two devices are handled tolerance and are 1000mL/min, gas residence time 0.8～2s.
When the crest voltage of input reactor was 22kV, the clearance of two group reaction devices was 98.6% and 32.6%.Apparatus of the present invention to the clearance of methyl sulfide far above single plasma reactor.
Table 1 is administered and is contained methyl sulfide foul gas test data of experiment
The 2g NACF is 1000mL/min to flow, and concentration is 847mg/m
3Methyl sulfide waste gas carry out adsorption experiment, behind the 9h absorption saturated.After the 2g NACF is installed in the said apparatus, be that after device one week of stable operation, NACF still has the good adsorption activity under the condition of 22kV and same source of the gas at crest voltage.
Claims (7)
1. device of administering foul gas and industrial VOCs, the insulation crust of bringing gas port and gas outlet into that comprises tubular, it is characterized in that: be provided with the electrode that is connected with high-voltage pulse power source in the inner chamber of described insulation crust, the inwall of insulation crust is attached with the adsorption layer of being made up of NACF of surrounding electric poles and the sheet metal of ground connection from inside to outside successively; Be provided with the barrier layer of being made up of porous ceramics between described adsorption layer and the sheet metal, load has transition-metal catalyst on the described barrier layer; The diameter of described NACF is 15～20 μ m.
2. device according to claim 1, it is characterized in that: described electrode is that porosity reaches 80～90% sintering metal line.
3. device according to claim 2, it is characterized in that: load has transition-metal catalyst on the described electrode.
4. according to claim 1 or 3 described devices, it is characterized in that: described transition-metal catalyst is at least a among Mn, Cu, Fe, Pb, V, Ni, Co and the Ti.
5. device according to claim 1, it is characterized in that: described insulation crust is cylindric, and electrode is arranged on the axis of insulation crust.
6. method of administering foul gas and industrial VOCs comprises: with foul gas or the gas that contains VOCs continuously by the arbitrary described device of claim 1 ~ 6.
7. method according to claim 6, it is characterized in that: described device volume is 300～500cm
3, input voltage is 10～60kV, and gas residence time is 0.8～2s, and the NACF volume is 1 ︰ 10～20 with the device volume ratio.
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| CN 201010608702 CN102091514B (en) | 2010-12-28 | 2010-12-28 | Device and method for treating obnoxious gas and industrial VOCs |
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| CN102091514B true CN102091514B (en) | 2013-07-03 |
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| CN103599696B (en) * | 2013-10-31 | 2015-04-15 | 浙江大学 | Method and reactor for catalytic degradation of gas-phase organic pollutants by external DC voltage |
| CN103961973A (en) * | 2014-05-09 | 2014-08-06 | 常州友达环保科技有限公司 | Adsorption device with built-in electric filter |
| CN106268206A (en) * | 2015-05-28 | 2017-01-04 | 刘颖姝 | Gas cleanup component and containing its gas purifier |
| CN104906948B (en) * | 2015-06-08 | 2017-03-08 | 张贺岭 | A kind of controllable type plasma body cooperative catalyst air cleaning system and using method |
| CN105749745B (en) * | 2016-05-12 | 2018-07-17 | 浙江工商大学 | A kind of thermoelectricity corona focuses the apparatus and method of catalytic degradation spray painting organic exhaust gas |
| CN106925085B (en) * | 2017-04-01 | 2019-08-09 | 南京工业大学 | Compact low-concentration organic exhaust gas processing unit |
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| CN107715663A (en) * | 2017-11-27 | 2018-02-23 | 沈阳工业大学 | A kind of system and method for adsorption type low temperature plasma advanced treating foul gas |
| CN107715664A (en) * | 2017-11-27 | 2018-02-23 | 沈阳工业大学 | A kind of system and method for group technology processing spraying waste gas |
| CN110302647A (en) * | 2018-03-27 | 2019-10-08 | 深圳市创海森科技有限公司 | A kind of regenerative gas absorption decomposer |
| CN109012709B (en) * | 2018-08-08 | 2021-06-11 | 东南大学 | Metal Fe modified black phosphorus alkene and preparation method and application thereof |
| CN111888900B (en) * | 2020-08-22 | 2022-04-15 | 山东第一医科大学(山东省医学科学院) | Carbon disulfide removal method based on low-temperature plasma reactor and coupling catalyst |
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| CN1931377A (en) * | 2006-09-26 | 2007-03-21 | 西安交通大学 | Adsorption and low temperature plasma combining indoor air purifying method |
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| CN201978653U (en) * | 2010-12-28 | 2011-09-21 | 浙江大学 | Device for treating odor and industrial VOCs (volatile organic chemicals) |
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| CN1614321A (en) * | 2003-11-06 | 2005-05-11 | 中国科学技术大学 | Plasma coupling light catalytic unit assembly and gas purifier therewith |
| KR100603810B1 (en) * | 2005-07-23 | 2006-07-24 | (주)티알이엔씨 | Apparatus for removing v.o.cs in painting equipment |
| CN1864820A (en) * | 2006-04-21 | 2006-11-22 | 中国人民解放军军事医学科学院卫生学环境医学研究所 | A low temperature plasma driven photocatalytic gas purification device |
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